On the Influence of Strain-Path Changes on Fracture.

Abstract

Abrupt changes in strain path between uniaxial and equibiaxial tension are shown to have a large effect on plane-strain ductility. Data for titanium sheets, both with and without hydrides, show that a significant ductility enhancement occurs at a final strain state of plane-strain tension following multi-stage deformation sequences comprised of uniaxial and equibiaxial tension. While the dependence of ductile fracture on both accumulated damage and strain hardening suggests that failure strains should be sensitive to a nonproportional strain-path history, the detailed cause(s) of the present effect is not known. Keywords: Fracture(Mechanics), Strain paths, Plane strain, Uniaxial tension, and Titaniumalloys.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1986
Accession Number
ADA172535

Entities

People

  • Donald A. Koss
  • S. C. Kestner

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Ductility
  • Elements
  • Engineering
  • Hardening
  • Materials
  • Materials Engineering
  • Materials Science
  • Military Research
  • Nucleation
  • Pennsylvania
  • Sequences
  • Strain Hardening
  • Titanium
  • United States
  • Universities

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.